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m_a_m_a [10]
3 years ago
7

What type of isotope undergoes radioactive decay?

Biology
1 answer:
kvv77 [185]3 years ago
4 0

Answer:

one that has an unstable nucleus

Explanation:

An isotope is defined as a chemical variant  present in an atom with different number of neutron but same number of protons.

Radioactive decay is the sudden breakdown of an atomic nucleus allowing matter and radiation to be emitted from the nucleus. A radioisotope with unstable nuclei undergoes radioactive decay because they do not have adequate binding energy to keep the nucleus together. there are four  types of Alpha, Beta, Gamma Decay and Positron Emission.

Hence, the correct option is "one that has an unstable nucleus"

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The anterior portion of the body of most annelids, such as the earthworm, is adapted for sensing the environment.
Diano4ka-milaya [45]

Answer:

The answer is False. Although sensitive cells are <u>more abundant</u> in the <u>anterior portion</u> of the annelid´s body, in general, they are arranged in all the segments.

Explanation:

Annelids, such as the earthworm, have a variety of sensory cells:    

  • <u>Mechanoreceptors</u>, disposed of in groups in <em><u>each segment</u></em> of their body.  
  • <u>Photoreceptors</u>: Light-sensitive cells. Although they are <em><u>located in the whole </u></em>body, they are <em><u>abundant in anterior and posterior segments</u></em>, concentrated in the intern and dorsal part of the epidermis.
  • <u>Humidity receptors</u> are the most sensitive cells and are <u>located in the first segments</u> of the earthworm body
  • <u>Chemoreceptors</u>: sensorial cells cumulus forming a prominent tubercle with prolongations that extends through the cuticle. These tubercles form three rings <em><u>in each segment</u></em> but are especially <em><u>abundant in the anterior part</u></em> of the body.

The tegument is very rich in free nervous terminations, which functions might be tactile.

6 0
3 years ago
When you are showing symptoms of a virus, what life cycle are you in? lysogenic or lytic?
il63 [147K]

Answer:

lytic

Explanation:

The lytic cycle involves the reproduction of viruses using a host cell to manufacture more viruses; the viruses then burst out of the cell

8 0
3 years ago
When the cat's amygdala is electrically stimulated the cat prepares to attack by hissing and arching its back. Which division of
myrzilka [38]

Answer:

Option-D

Explanation:

The network of neurons which gets activated in the condition of stress that is fear or anger is known as Sympathetic nervous system.  

During stress conditions, this system prepares the body physically and mentally either to fight or flight by controlling the production of hormones through activation of specific neuron network in the body. Mainly the adrenaline and norepinephrine which act and produces the response like increased heartbeat, sweating and other.

Thus, D)sympathetic is the correct answer.

7 0
3 years ago
How many body cells does a gamete have
Harlamova29_29 [7]
"Body cells<span> are </span>body cells<span> or somatic </span>cells<span> are produced by mitosis. ... </span>Gametes are sex cells, so the egg and sperm. They are considered haploid because each gamete contains<span> half the number of chromosomes that an organism's somatic </span><span>cells will have" So Gamete has 23 Chromosomes</span>
3 0
3 years ago
What are the three general types of questions that perception helps us answer regarding our environment?
Lisa [10]

Explanation:

Because we always seek to make sense of any perceived stimulus to better understand the reality that surrounds us and act before it. Through perception we process information from the senses, with which the brain builds and tries to give meaning to those stimuli that reach it. However, each person captures, selects and organizes sensory stimuli differently and, therefore, arrives at different interpretations and responses when solving a problem, in which memory and experience also form a fundamental role. Thus, differences between perceptions help explain how people interpret the environment and why they behave differently in the same situation. For example, when we recognize a specific object, an action can be initiated, in which a motor activity is propitiated in response to that recognition, and which can be different in each person.

3 0
3 years ago
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